I took these pictures a couple months ago, because I thought that they'd be helpful for someone who wants to do an auxillary battery/solar setup, but maybe doesn't have the skill or cash to build or buy a battery box. Here is my battery box (though i've changed my configuration to 12 volt because of my solar panel, and I also added a 12v power point outlet to it). I took an old Igloo 32 can cooler that someone was throwing away, drilled two holes for the positive and negative terminal connectors and a hole for a short length of fuel line which I used as a vent tube. I put the batteries inside and sealed the holes with RTV silicon. I store the box under my bed, and run the vent tube out of one of the original bolt holes from the seats I took out.